Wiring safety evaluation system and wiring safety evaluation method
AssigneeMitsubishi Aircraft Corporation
InventorsKoji Toyama, Susumu Hirabayashi
Life of this patent
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Abstract
A wiring safety evaluation system that makes it possible to easily determine whether a plurality of electrical wires secured in redundancy belong to the same harness to evaluate wiring safety is provided. The wiring safety evaluation system according to the present invention includes a processing section that identifies, after an event ID is specified, whether a gate type of a parent ID corresponding to the event ID is an OR gate or an AND gate, and when the gate type is the OR gate, repeats a process procedure of identifying whether a gate type of a parent ID that is a parent in next generation of the parent ID is an OR gate or an AND gate to determine whether the specified event causes a top event.
Claims17
A wiring safety evaluation system in a wiring structure in which a plurality of electrical wires belonging to a wire harness are each connected, through relay elements, to a pair of connectors located at respective ends of the wire harness, the safety evaluation system comprising:
- memory configured to hold fault tree information, the fault tree information associating event IDs serving as identification information of respective events relating to an electrical wire of the plurality of electrical wires, gate types indicating respective types of gates corresponding to the respective event IDs, parent IDs serving as identification information of parent events within a fault tree above a level of the events of each of the event IDs, and identification information indicating whether a parent ID;
- and
- a processor that, by referring to the fault tree information, is configured to execute an extracting step of extracting event IDs relating to one of the electrical wires and execute an evaluation of the extracted event IDs, the evaluation including:
- a first step of identifying whether a type of gate between one of the extracted event IDs and a first parent ID at an immediate upper level to the one of the extracted event IDs is an OR gate or an AND gate, and
- a second step of identifying, when the gate type is identified as the OR gate, whether a type of gate between the first parent ID and a second parent ID at an immediate upper level to the first parent ID is an OR gate or an AND gate,
- wherein, the second step is repeated for parent IDs at successively immediate upper levels, and
- wherein when the gate type identified by the second step is the AND gate, the one of the extracted event IDs is determined not to be the only cause of the top event.
A wiring safety evaluation method of evaluating safety of a plurality of electrical wires in a wiring structure in which the electrical wires belonging to a wire harness are each connected, through relay elements, to a pair of connectors located at respective ends, by causing a processor to refer to information stored in memory, the method comprising:
- holding in the memory fault tree information, the fault tree information associating event IDs serving as identification information of respective events relating to an electrical wire of the plurality of electrical wires, gate types indicating respective types of gates corresponding to the respective event IDs, parent IDs serving as identification information of parent events within a fault tree above a level of the events of each of the event IDs, and identification information indicating whether a parent ID is a top event;
- and
- with the processor, by referring to the fault tree information, extracting all of the event IDs relating to one of the electrical wires and executing an evaluation of the extracted event IDs, the evaluation including:
- a first step of identifying whether a type of gate between one of the extracted event IDs and a first parent ID at an immediate upper level to the one of the extracted event IDs is an OR gate or an AND gate, and
- a second step of identifying, when the gate type is the OR gate, whether a type of gate between the first parent ID and a second parent ID at an immediate upper level to the first parent ID is an OR gate or an AND gate,
- wherein, the second step is repeated for parent IDs at successively immediate upper levels, and
- wherein when the gate type identified by the second step is the AND gate, the one of the extracted event IDs is determined not to be the only cause of the top event.
Dependencies are inferred from the claim text.